bug#29462: 24.4; eval-when-compile won't mute warning as says in info doc

[Eli Zaretskii]

> From: Emanuel Berg <moasen@zoho.com>
> Date: Mon, 27 Nov 2017 02:21:53 +0100
> 
> 
> In (info "(elisp) Warning Tips"), it says
> 
>    * If you use many functions and variables
>      from a certain file, you can add
>      a ‘require’ for that package to avoid
>      compilation warnings for them.
>      For instance,
> 
>           (eval-when-compile
>             (require 'foo))
> 
> However that won't mute the warnings.
> Using (eval-when-compile (require 'cl-lib)) it says
> 
>     In end of data:
>     wrap-search-cp.el:133:1:Warning: the
>     function `cl-find-if' might not be defined
>     at runtime.

Thanks, fixed.